diff --git a/backend.native/tests/build.gradle b/backend.native/tests/build.gradle
index 568b3ece109..2253068bcdc 100644
--- a/backend.native/tests/build.gradle
+++ b/backend.native/tests/build.gradle
@@ -51,6 +51,7 @@ repositories {
 }
 
 dependencies {
+    compile 'org.jetbrains.kotlinx:kotlinx-coroutines-core:1.3.7'
     cli_bc project(path: ':backend.native', configuration: 'cli_bc')
     def updateTestData = true
     if (project.hasProperty("kotlinProjectPath")) {
diff --git a/backend.native/tests/debugger/src/test/kotlin/org/jetbrains/kotlin/native/test/debugger/DistProperties.kt b/backend.native/tests/debugger/src/test/kotlin/org/jetbrains/kotlin/native/test/debugger/DistProperties.kt
index 03e54c67c84..cfcd7e24034 100644
--- a/backend.native/tests/debugger/src/test/kotlin/org/jetbrains/kotlin/native/test/debugger/DistProperties.kt
+++ b/backend.native/tests/debugger/src/test/kotlin/org/jetbrains/kotlin/native/test/debugger/DistProperties.kt
@@ -15,6 +15,7 @@ object DistProperties {
     private val konancDriver = if (HostManager.host.family == Family.MINGW) "konanc.bat" else "konanc"
     val konanc: Path = dist.resolve("bin/$konancDriver")
     val lldb: Path = Paths.get("lldb")
+    val devToolsSecurity: Path = Paths.get("DevToolsSecurity")
     val lldbPrettyPrinters: Path = dist.resolve("tools/konan_lldb.py")
 
     private fun requireProp(name: String): String
diff --git a/backend.native/tests/debugger/src/test/kotlin/org/jetbrains/kotlin/native/test/debugger/Driver.kt b/backend.native/tests/debugger/src/test/kotlin/org/jetbrains/kotlin/native/test/debugger/Driver.kt
index c53ebcf45f0..0ad7dadc801 100644
--- a/backend.native/tests/debugger/src/test/kotlin/org/jetbrains/kotlin/native/test/debugger/Driver.kt
+++ b/backend.native/tests/debugger/src/test/kotlin/org/jetbrains/kotlin/native/test/debugger/Driver.kt
@@ -5,9 +5,18 @@
 
 package org.jetbrains.kotlin.native.test.debugger
 
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.GlobalScope
+import kotlinx.coroutines.async
+import kotlinx.coroutines.runBlocking
 import org.jetbrains.kotlin.cli.bc.K2Native
+import java.io.ByteArrayOutputStream
+import java.io.InputStream
+import java.io.StringReader
+import java.lang.StringBuilder
 import java.nio.file.Files
 import java.nio.file.Path
+import java.time.temporal.ChronoUnit
 import java.util.concurrent.TimeUnit
 
 class ToolDriver(
@@ -31,7 +40,7 @@ class ToolDriver(
     }
 
     fun runLldb(program: Path, commands: List<String>): String {
-        val args = listOf("-o", "command script import \"$lldbPrettyPrinters\"") +
+        val args = listOf("-b", "-o", "command script import \"$lldbPrettyPrinters\"") +
                 commands.flatMap { listOf("-o", it) }
         return subprocess(lldb, program.toString(), "-b", *args.toTypedArray())
                 .thrownIfFailed()
@@ -63,15 +72,41 @@ data class ProcessOutput(
 fun subprocess(program: Path, vararg args: String): ProcessOutput {
     val start = System.currentTimeMillis()
     val process = ProcessBuilder(program.toString(), *args).start()
-    val outReader = process.inputStream.bufferedReader()
-    val errReader = process.errorStream.bufferedReader()
-
-    val timeout = 5L
-    if (!process.waitFor(timeout, TimeUnit.MINUTES)) {
-        process.destroy()
-        error("$program is running for more then $timeout minutes")
+    val out = GlobalScope.async(Dispatchers.IO) {
+        readStream(process, process.inputStream.buffered())
     }
-    val stdout = outReader.readText()
-    val stderr = errReader.readText()
-    return ProcessOutput(program, process, stdout, stderr, System.currentTimeMillis() - start)
-}
\ No newline at end of file
+
+    val err = GlobalScope.async(Dispatchers.IO) {
+        readStream(process, process.errorStream.buffered())
+    }
+
+    return runBlocking {
+        try {
+            val status = process.waitFor(5L, TimeUnit.MINUTES)
+            if (!status) {
+                out.cancel()
+                err.cancel()
+                error("$program timeouted")
+            }
+        }catch (e:Exception) {
+            out.cancel()
+            err.cancel()
+            error(e)
+        }
+        ProcessOutput(program, process, out.await(), err.await(), System.currentTimeMillis() - start)
+    }
+}
+
+private fun readStream(process: Process, stream: InputStream): String {
+    var size = 4096
+    val buffer = ByteArray(size) { 0 }
+    val sunk = ByteArrayOutputStream()
+    while (true) {
+        size = stream.read(buffer, 0, buffer.size)
+        if (size < 0 && !process.isAlive)
+            break
+        if (size > 0)
+            sunk.write(buffer, 0, size)
+    }
+    return String(sunk.toByteArray())
+}
diff --git a/backend.native/tests/debugger/src/test/kotlin/org/jetbrains/kotlin/native/test/debugger/Matchers.kt b/backend.native/tests/debugger/src/test/kotlin/org/jetbrains/kotlin/native/test/debugger/Matchers.kt
index f46052c84b0..edbf6b7dc49 100644
--- a/backend.native/tests/debugger/src/test/kotlin/org/jetbrains/kotlin/native/test/debugger/Matchers.kt
+++ b/backend.native/tests/debugger/src/test/kotlin/org/jetbrains/kotlin/native/test/debugger/Matchers.kt
@@ -62,6 +62,15 @@ fun lldbTest(@Language("kotlin") programText: String, lldbSession: String) {
         return
     }
 
+    if (!isOsxDevToolsEnabled) {
+        println("""Development tools aren't available.
+                   |Please consider to execute:
+                   |  ${DistProperties.devToolsSecurity} -enable
+                   |or
+                   |  csrutil disable
+                   |to run lldb tests""".trimMargin())
+        return
+    }
     val lldbSessionSpec = LldbSessionSpecification.parse(lldbSession)
 
     val tmpdir = Files.createTempDirectory("debugger_test")
@@ -76,6 +85,15 @@ fun lldbTest(@Language("kotlin") programText: String, lldbSession: String) {
     lldbSessionSpec.match(result)
 }
 
+private val isOsxDevToolsEnabled: Boolean by lazy {
+    //TODO: add OSX checks.
+    val rawStatus = subprocess(DistProperties.devToolsSecurity, "-status")
+    println("> status: $rawStatus")
+
+    val r = Regex("^.*\\ (enabled|disabled).$")
+    r.find(rawStatus.stdout)?.destructured?.component1() == "enabled"
+}
+
 private val haveLldb: Boolean by lazy {
     val lldbVersion = try {
         subprocess(DistProperties.lldb, "-version")